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ADC-SDI  

Rev. 

 

3 Configuration 

3.1 Data path 

The Analogue input is identified, the synchronization information in the analogue signal is 
detected, and the analogue signal is digitized to a 10-bit parallel signal in a dedicated chip. A 
FPGA adds EDH-information and Field 1 marking.  Finally a chip serializes and scrambles 
the signal, and drives the resulting 270 Mb/s SDI-signal onto three output connectors. 

3.2 EEPROM 

The ADC-SDI card actually has two EEPROM's. A small EEPROM is included in the 
microcontroller, while a larger external EEPROM holds the configuration memory of the 
FPGA and the input video chip. 

3.2.1 Internal EEPROM 

State variables are written to EEPROM in the microcontroller each time a configuration 
change is made. Basically, the card remembers it's setting between power-downs. 

3.2.2 External EEPROM 

The configuration memory of the FPGA and the input video chip is upgradeable. This is, 
however, a task for qualified maintenance personnel. 

3.3 Power-up sequence 

At power-up, the card performs a self-check, and initiation. The manual mode switch is then 
sampled.  If manual mode is enabled, the other switch settings are read and the state of the 
card set accordingly. If manual mode is disabled, the state the card held the previous time it 
was used is read from EEPROM. The interplay between the EEPROM, the switches and the 
GYDA (or other) controller adheres to the following simple rules: 

  If a GYDA controller is present in a system, it can always override manual settings. 

  If the manual mode is used together with a GYDA controller, the ADC-SDI will initiate 

as determined by the switches, and may then be overridden by the controller. 

  If the manual mode is not used, the ADC-SDI will initiate as determined by the state 

of the EEPROM. It is subsequently controlled by the GYDA controller. 

  At any time, when a state change is done, whether it be by switches or GYDA, the 

state is stored in the EEPROM as soon as it is detected. 

3.4 Channel search modes 

ADC-SDI will search for an input-signal, try to identify it and hopefully find a signal it can lock 
to.  

ADC-SDI has 2 input channels with 3 types of input: 

 CVBS 

Channel 

 CVBS 

Channel 

  S-Video: Luma Channel 1, Chroma Channel 2. 

 
  

network-electronics.com 

Summary of Contents for ADC-SDI

Page 1: ...network electronics com NTSC PAL to SDI encoder Rev 6 Flashlink User Manual ADC SDI...

Page 2: ...ation and EFUP 3 2 2007 06 26 T Corrected value for Return loss to 35 dB under specifications Applied new document template cleaned up document structure added Appendix A Materials declaration and rec...

Page 3: ...ion of luma chroma separation filter 8 4 Connections 9 4 1 Mounting the connector module 9 4 2 Correspondence of connectors and signals 9 5 Operation 11 5 1 Module status Light Emitting Diodes 11 5 2...

Page 4: ...ller 1 Attach Analogue input CVBS or S Video and SDI output to the backplane module see Figure 2 2 Set DIP switch 1 on towards backplane switches 2 and 3 according to the Input Channel search mode you...

Page 5: ...eturn loss 15 dB 2 2 Analogue input both PAL 625 50 and NTSC 525 60 Input formats CVBS S Video Input level 1000 mV nominal 10 mV Return loss 35 dB 2 3 Processing performance Signal path 10 bits Video...

Page 6: ...forms a self check and initiation The manual mode switch is then sampled If manual mode is enabled the other switch settings are read and the state of the card set accordingly If manual mode is disabl...

Page 7: ...line 0 comb filter and no comb filter Adaptive comb filter is available for both luminance and chrominance The adaptive comb filter algorithm computes the vertical and horizontal contours of colour ba...

Page 8: ...bandwidth available Some cross colour artefacts at vertical transition Graphics material with high saturation may produce artefacts at vertical edges Best suited for PAL signal sources Very good for m...

Page 9: ...nalog input CVBS or S Video Luma Ch2 Analog input CVBS or S Video Chroma Dup1 Passive loop through Ch1 Dup2 Passive loop through Ch2 SDI1 Digital SDI output SDI2 Digital SDI output SDI3 Digital SDI ou...

Page 10: ...ADC SDI Rev 6 Figure 3 ADC SDI simplified silkscreen figure not to scale network electronics com 10...

Page 11: ...roperly locked 5 1 3 State of input channel 2 No Light Channel 2 is inactive Red ADC SDI tries to detect input signal on channel 2 Yellow Input signal is detected on channel 2 but not yet locked Green...

Page 12: ...off the ADC SDI is assumed to be used with a GYDA controller Factory setting is switch 1 in off position With switch 1 off While in automatic mode switches 2 3 4 and 5 are without any effect With swit...

Page 13: ...in the factory default position this is the time to do so Turn switches 1 through 9 to the off position Switch 10 should as always be turned to the on position Power up The card EEPROM is now reset t...

Page 14: ...ature MarkF1 off OK Turn off the Mark Field 1 feature get 0xHH Yes Get a value from a numbered register set 0xHH 0xHH No Set a value to a numbered register filter 0 OK Select luma chroma separation fi...

Page 15: ...the ADC SDI card search for any possible input type CVBS Ch 1 CVBS Ch 2 or S Video with Luma on Ch 1 and Chroma on Ch 2 The other three commands will force the ADC SDI card to search for only one of t...

Page 16: ...ut Try lock CVBS Ch 2 CVBS found on Ch 2 not yet locked No SDI output Try lock S Video S Video found not yet locked No SDI output Locked video standard CVBS Ch 1 Stable locked CVBS on Ch 1 SDI output...

Page 17: ...ion under the following environmental conditions Operating room temperature range 0 C to 40 C Operating relative humidity range Up to 90 non condensing 2 The equipment will operate without damage unde...

Page 18: ...d conditions for the product s covered by this manual follow the General Sales Conditions by Network Electronics AS These conditions are available on the company web site of Network Electronics AS www...

Page 19: ...ation of the draft guidance For our own products Network Electronics has chosen to use the 50 year figure recommended in this draft regulation Network Electronics suggests the following statement on A...

Page 20: ...Where it is not possible to return the product to Network Electronics or its agents for recycling the following general information may be of assistance Before attempting disassembly ensure the produc...

Page 21: ...ONISED STANDARDS applied in order to verify compliance with Directive s EN 55103 1 1996 EN 55103 2 1996 TEST REPORTS ISSUED BY Notified Competent Body Report no Nemko E07379 00 TECHNICAL CONSTRUCTION...

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